Supply-controlling mechanism for gas-engines.



No. 317.193. PATBNmEDAPR.'1u.--19os, r. K; DE LA SAULX.

SUPPLY CONTROLLING MEGHAN-ISM FOR. GAS ENGINES.

ABPLxoATIoN-FILBD MAY 17. 1904.

l#uniran Asuf-ras PATENT orifice., y

raanarnc maar DE LA 4sAu'L'x,"creeranno. Naan LIEGE, BELGIUM'.

"SUPPLY-CONTROLLING* VVI'lIIECHANISIVl FOR. GAS-ENGINES.

Specification of Letters Patent.

Patented Aprii 10, 1906.v

Application filed May 17', 1904. Serial No. 208,424.

y Be'i,tim0wnt11a,i, FREDERIC Kam DE LA SAUL-x, engineer, a subject-of'the'King of 4lfelgiurimjresidingat Seraing, nean Liege, in 5 .thel'ingdom ofBelgiuni, have invented certain new and useful Improvements in Supply- ,Contr'olling Mechanism for 'Gas-Engines, `of

which the following is a specification.

p This invention relates to means for admitting theair-and-gas `mixture and controlling ythe gassupply in gas-en ines working withva variable charge of exp osive mixture and with constant compression.-V

-The urpose of the invention is' to provides combination of a gas-valve arranged concen- -trically with a mixture inlet valve with means for controlling the o ening of the gas valve by the governor of tie engine, the ex tent of opening of the fgas-inlet valve being limited by the extent o opening of the mix ture-inlet valveby aid of a suitable connection between the two valves in such a manner A v that Whatevermay be'the point of the suc-Q tion-stroke at which the opening of the gasvalve takes place the com osition of the mixture admitted, to the cy inder remains the same.4 i

rlhe invention further consists in the special combinations of parts as hereinafter fully described, and pointed out in the appendedY claims.

The annexed drawing gives a Vsection through the cylinder of a gas-engine, said iigure showing vthe special arrangement of supply mechanism according to theinvention.

Theengine may be of any suitable con- I struction. Therefore all the parts which are not directly concerned by the invention have been suppressed or are not shown, said construction being Well known to those skilled in the art.

In the drawing, 1 is the cylinder of the enine, suitably mounted on a frame'2. Said cylinder is provided with an inlet-opening Above said inlet-opening a valve-case 5 1s on the cylinder by' aid of a iiange 4.

Said valve-case is provided with a central duct 6, communicating with a connection 7,

to wh-ich the gas-pipe (not shown) is suitably 6-0 connected. The valve-case 5, further, is provided wi-th acliamber 8, concentrically. arranged with regard to the central duct 6 and connected in any 'appropriate manner to an air-pipe or air-inlet.' (Not shown.)

On the valve-case 5 is mounted a pillar 9,

through which a rod 10 yis guided, said rod passing through a guide 11 and being provided at its lower end with a valve 12, ad apt- A cy- 7o ed to close the inlet 3 in the cylinder. lindrical valve 13 is also iixed on the rod 10, and consequently rigidly connected with valve 12, and is adapted to close the annular opening of the chamber S in the central duct 6. y Said cylindrical valve 13 is fitted with 75 ports 14, adapted to establish the communication between the air-chamber 8 and the central duct 6 when the cylindrical valve 13 is in a lowered position. The rod 10, carrying the two valves 12 and 13, is guided at its upper 8o end in the bottoni 15 of a box 16, carried on the pillar 9. A spring 17 is placed in said box, one end of said sprlng hearingA on the bottoni 15 of the box 16 and the other end against a plate'lS, fixed on the rod 10 by nuts 85.l

19. The spring 17 holds normally the valves 12 and 13 in the closed position, as shown on the drawing. The rod 10 is provided with a screw-threaded portion 20, carrying a sleeve 21, which maybe acted upon by the endof a 9oswing-lever 22, rocking on a pivot 23,'suitably supported on the pillar 9. The second end of the swing-lever 22 is coginected by a pivot 24 to a rod 25, fitted at itsend with a' roller 26, restin a shaft 28. Sai sihaft is rotated, as usual, from the main shaft of the engine at half the speed of the main shaft. The endof the rod 25 is held iii position with regard to the cam 27 by aid of a jointed. lever29, rocking on a rcc pin 30, suitably supported on the frame of the engine. As it will be seen, the roller 26 1s consequently held against the cam 27 by aid of the spring 17. At the moment thaty the cam 27 acts upon the roller 26 and 'lifts the 105 same the swing-lever 22 is acted upon by the rod 25, thus causing the rod 10 to effect a downward movement and opening simultaneously the valves 12 -and 13.

The rod 10 is passed through a hollow rod 1 1o 31, adapted to slide freely upon the rod 10l and fitted at its lower end wlth a valve 32,

Uainst a cam 27, keyed on a l9 5 which in the position shpwn on the drawing cuts off the communication between the asduct 7I and the central duct 6. :The ho low rod 31 is provided with a sliding sleeve 33, against whichrests the end of a spring 34, the other end ofwhich rests againstva plate 35, xed on the screw-threaded portion'of the rod 10. The-downward movement 'of the sleeve 33 on the hollow rod 31 is prevented by a nut 3'6 in such a manner that at the Inoment. the swing-lever ,22 vcauses the downplamed.

ward movement of the rod 10 the sprin 34 will be'V compressed by the plate 35. aid spring pressing against the sleeve 33 tends to cause a downward movement of the hollow rod 31, and consequently the valve 32 should be moved away from its seat if itA was free to .do so, which is not the case', as`will appear' hereinafter. The hollow rod 31l isfurther rovided at its upper end witlgaslve 37, igrmly attached thereto, between whiclLandthe sleeve 33 a second spring 38 is placed, the special function of which wiil be later eX-' 45 in Which moves the piston 44. The dashpot cylinder is tted'with a small adjustable outlet-opening 46 for air. The end 47 of the swing-lever 39 may be caught under a hook 48, pivoted at 49 on a support 50. The said hook 48is acted upon bya spring 51, which holds'the lower arm of the hook 'in contact througha roller 52 with a' cam 53, mounted on a pin 54, provided with an arm 55, to which is pivoted a'rod- 56, connected to one end of a swinglever 57, the second end of which is pivoted at 58 to the rod v59 of ari eccentric 60 on shaft 28.

The swingfleve'r ,57 is mounted on an eccentric 61 ona little shaft 62, rigidly connect ed to a lever 63 ,which isconnected, through a rod 64, to the lever 65 of the governor 66 of the engine. A The operation is as follows: lf the engine is running normally at the beginning of the suction-stroke, when the cam 27 acts upon the roller 26 the hook 48 -is engaged with the end of the swing-lever 39. Consequently.

during the time thatsaid cam 27 lifts the rod 25 and rocks thecswing-lever 22 the latter causes the downward movementof the rod 10; thus causing only lthe opening of valves` 12 and1-3.v Air is consequently sucked intothe cylinder. As a consequence of the rocking of theswing-lever 22 the-spring 34, acting on-the sleeve 33, lis compressed, as abo've described, and the rod 41 moves the piston 44 in ying the valves 12 and13.

the daslipot Cylinder 4 5. At the mornet that thegas supply must take place the. cam l53 is actuated' through vlever 55, rodv56'-,` and the 'swing-lever. V57 imderfthe action of the ec`- centric-60. The cam Q53', lacting on the roller 52, causes the hook 48 to be ,disengagedfrom the end 47 of the swing-lever.. The swingleve'rl39 being released may be oscillated under the pressure of the spring'34 ac tingon the sleeve 33 in Asuch a manner that lsaid sleeve causes the'do'wnward movement o ftht. holl'owi'od'BJ andthe opening4 o f the gas valve 32, while-the adjustable device 41 44 45 returns to its normal length on account of 'the lifting of the corresponding end. of .the swing-lever 39. "The amount of opening of.

the valveA 32 c onsequentlyvaries with the displacementto which the `p1stone44 has been subjected-in the dashepot cyllnder 45 at the `moment of. oscillation ofthe swing-levenv 22. As the proportions oi the 'arms of the swing-- levers 22 and 39 are'such thatthe openings ofzthe' valves 32 and 12 are in the proper-ratio for giving a suitable gas mixture whenfthe length'of the device 41 44 45.is minimum, itwill be obvious that whatever may be the momer'ft'aewhichthe hook y48 -is released the valve 32 will always open exactly the desired- -amount to obtain the same composition of vmixture. gas-valve 32 is effected by the eccentric 6'1.`

The action of the governor on the The rising or lfalling of Athe governor causes theshaft 62 to be artially rotated through c the rd 64and the ever 63. v The said rota-l tion caiise's `a displacement of the-eccentric position of the center of oscillation of the swing-lever 57. This variation of Vposition has the--same effect as a modification inthe length of the' rod 56 in such a manner lthat the momentat which the hookf 47 is acted upon by the canr 53,t akes place sooner or later, according tothe action of the governor." At the end of the suction-stroke when the supply is to becutoff the roller 26 follows the cam 27 andithe spring 17lifts the rod 10, clos- The movement of the rod 10is transmitted, throught-he swinglever 22, the adjustable rod 41, and the dash# pot 44 45, to the swing-lever 39, whioh acts A upon thev hollow rod 3'1, closing simultaneously the gas-valve 32.

61, which produces a slight variation in the IIO It will be observed that the swing-lever 39 does not act directly on the hollow rod 31, but

only b y aid of the sleeve 33 and spring 38, interposecl'betw'een said sleeve and sleeve 37, mounted at the end. of the hollow rod 31. This arrangement has the special purpose of pr venting the valve 1,2 from beinfT incomple ely closed in case the valve 32 sliould be brought back upon its seat before the said valve'12 had reached its own'seat. Should this occur, owing to the interposition of the spring 38 between the sleeves 33 and 37, at the moment' when valve 32 closes, the spring 17 should easily i compress the spring 38.,.thus allowing the s ght additional movement of the swing-lever 39 required in orderth'at the valve 12 may be brought back upon its seat.

VIt will further be observed that the amountof opening of the valve 32 depends upon lthe amplitude of movementof the hollow rod 31, which movement is given by the distance comprised between the piston 44 and the bottom of the cylinder'45 of the dash-pot at the moment that the hook 48 is disengaged from the end of the swing-lever. The `air contained in the dash-pot is expelled at this.

moment through the adjustable opening 46 and acts as a bu'lfer to soften 'the impact of.y

the pieces.

What I claim is-l 1. In a supply-controlling mechanism for gas-engines the combination with the cylindene? an inlet-opening in said cylinder, a mixture-inlet valve closing said'inlet-opening, an air-supply valve rigidly connected to the mixture-in et valve, a gas-valvearranged concentrically with the mixture-inlet valve, a governor, means for controlling'the moment of opening of the gas-valve by the governor and a connection between the gas-valve and 'the mixture-inlet lvalve so as to limit the the 'mixture-inlet valve in suchl a mannerl that the said valves may be opened independently and closed simultaneously the amount of opening of the gas-valve being. limited byy the amount of opening of the mixture-inlet valve, substantially as described and for the purpose set forth. v

' 3. In' a supply-controlling mechanism for gas-engines, the combination with the cylinder 'of aninlet-opening in said cylinder, a iiiiXture-inlet valve closing said ,inlet-opening, a rod carrying said mixture-inlet valve, an air-supply valve mounted on said rod, a

swing-lever actuating the rod, means for oscillating the said swing-lever, a spring holdingnormally the valve in its closed position, a

gas-valve, a spring adapted to move said gasvalve rod downward Vwhen the mixture-inlet valve is moved downward, a swing-lever acting on the gas-valve rod, a governor, means acted upoii'by the governor and acting o ii the 5 said swing-lever to prevent the downward Vrod and adapte, to

` inlet vil'veis moveddownward and a connec" tion between the two 'swin -levers whereby the mixture-inlet valve an the gas-valve maybe `opened separately and independently but are c osed simultaneop, ly when the mixture-inlet valve closes, su stantially as' described and for the purpose set forth.

4.- In a supply-controlling mechanism for gas-engines, the combination with the cylinder of an inlet-openingin said cylinder, a

mixture-inlet valve closings'aid inlet-opening,

a rod carrying said mixture-inlet valve, an airv siipply'valve mounted on said rod, a swing-lever-actuating the mixture-valve rod, a spring hol ding normally the mixture-inlet valve in its closed position, means acting on the swinglever and adapted. to open the mixture-inletvalve, a gas-valve arranged concentrically with the mixture-inlet valve, a hollow rod .tnrough which passes the rod of the mixtures ring acting on said hollow Ine compressed when the mixture-inlet-valve rod is moved downward, a second swing-lever acting on the said hollow rod, a hook adapted to hold thesecond swing-lever in a given position, a` governor, ay transmitting device between the governor and# the hook to disen age the hook from the swing-lever under t `e action of the governor, arod pivoted tothe swing-lever actuating the mixture-inlet valve, a piston carried by the said rod and a dash-pot cylinder pivoted on the swing-lever actuating the as-valve subinlet valve, a

Vstantially as described and fort e purpose set forth.

5. In a supply-controlling mechanism for gas-engines, the combination with lthe cylinder of an inlet-opening in said cylinder, a mixture-inlet valve closing said opening,'.an air-supply valve moved simultaneousl with thel'mixture-inlet valve, a gas-valvea apted to be opened independentlybut closed simultaneously with the mixture-inlet valve, means whereby the amount of opening of the gasvalve is limited bythe amount of opening of the mixture-inlet valve, actuating4 means' for the mixture-inlet valve, a governor and means controlled by the governor for varying the moment of opening of the gas-valve substantially as describe/ l and for the purpose set 6. In a supply-controlling mechanism Afor as-eiigines, tliecombination with tlie cylinader of an inlet-opening in said cylinder, a mixture-inlet valve, closing said opening, an air-supply valve moved simultaneously with the mixture-inlet valve, a gas-valve adapted to be opened independently but closed simul-v taneously with the mixture-inlet valve, means wlieieby the amount o1 opening or the gas- ,`valve .is limited by the amount of opening of the mixture-inlet valve, means actuating he iiiiXtuie-iiilet valve so as to hold said valve iii its open position during the whole of the suciiiovenient of the gas-valvewlieiitliemixt/urei tion-stroke, a transmitting device acting on the gas-valve to open said Valve et :i givenand for the purpose set forth.

T. In a supply-controlling mechanism for Igas-engines,the combination with the cylinder of an inlet-opening in seid cylinder, a mixture-inlet valve closing said inletopening, an air-supply Valve moved simulteneouslrv with the mixture-inlet Valve, av gas-Valve adapted to be opened independently but closed simultaneously with the mixture-inlet Valve, means Whereb)v the amount' of opening?r ot' the gasvnlve is controlled by the amount of opening of the mixt ure-inlet valve, n swinglever acting on the gas-valve to hold said valve upon its seat, 2L hook adapted to engage simios with the 4said swing-lever, a crn acting on the said hook to disengage the same from the swing-lever, a shaft carrying the said cam, e

lever dapted to partiallyrotate the camshaft, arod connected at one end to the said lever7 e swing-lever connected to the said'rod, ineens actuating the swin lever, an eccentric on which the said swingever is mounted, a governor and means controlled by the governor, to vary the position of the eccentric so as to cause a. Variation in the position of the center of oscillation of the swingflever, substantially as described and for the'purpose set forth. I

In witness whereof I have hereunto Set my hand in presence of two Witnesses.

H, SAVAGE, PAUL DE SCHEUPIER. 

